diff --git a/crates/ethcore/src/engines/authority_round/mod.rs b/crates/ethcore/src/engines/authority_round/mod.rs
index 0dc456b32f..6e935ad15e 100644
--- a/crates/ethcore/src/engines/authority_round/mod.rs
+++ b/crates/ethcore/src/engines/authority_round/mod.rs
@@ -150,12 +150,6 @@ pub struct AuthorityRoundParams {
     pub fees_contract_transitions: BTreeMap<u64, Address>,
 }
 
-const TX_FEE_EVENT_NAME: &'static [u8] = &*b"TxFee(address,uint256)";
-
-lazy_static! {
-    static ref TX_FEE_EVENT_NAME_HASH: H256 = keccak(TX_FEE_EVENT_NAME);
-}
-
 const U16_MAX: usize = ::std::u16::MAX as usize;
 
 /// The number of recent block hashes for which the gas limit override is memoized.
diff --git a/crates/ethcore/src/machine/impls.rs b/crates/ethcore/src/machine/impls.rs
index 1a5f8020ed..c5eb64b6cb 100644
--- a/crates/ethcore/src/machine/impls.rs
+++ b/crates/ethcore/src/machine/impls.rs
@@ -442,7 +442,7 @@ impl EthereumMachine {
         if !is_airdao_tx {
             if let Some(price) = gas_price {
                 if t.tx().gas_price < price {
-                    return Err(transaction::Error::InsufficientGas { minimal: price, got: t.tx().gas_price });
+                    return Err(transaction::Error::InsufficientGasPrice { minimal: price, got: t.tx().gas_price });
                 }
             }
         }